It we do not research the legal status of human body thoroughly, and we can not construct organ donation legal system reasonably, because the one who holds the predominant power of human body, holds the right to donate organs. The human body includes live body and cadaver. If the ordinary people holds the autonomous right of their bodies, the ordinary people can decide to donate organs or not. The cadaver is not a living individual, so it is not in the discussion of body autonomous right. Who, the family members or government, owns the ownership of the cadaver and can dispose the cadaver? As for the conversion point of body and cadaver, also we call it death conception problem, should be researched thoroughly too. We must make sure what is death, then we can define the line between body and cadaver. Body and cadaver are different in legal status, so organs attached to live body is different from organs attached to cadaver in legality, and of course we have to design different systems to cope with live body organ donation and cadaver organ donation.